Stamp-tappet.



PatentedAug. 59,19132, C. C. EUEGER STAMP TAPPET.

' (Application UNITED STATE- P- TENT OFFicE.

CHARLES C. RUEGER, O-F'; BUTTE, MONTANA.

STAMEP-TAPCPLET.

SPECIFICATION formir ig part of LettersPatent No. 707,259, dated August19, 1 902. Applioatihn filed l lune $19101. Serial meazto. (No model.)

To all whom it may concern:

Be it known that I, CHARLES 0. RUEGER, a

citizen of the United States, residing'at'Butte,

county of Silverbow, State ofMontana, have invented an Improvement inStamp-Tappets;

and I hereby declare the followingito .bea full, clear, and exactdescription of the same.

My invention relates to an'improvementin tappets such as are secured' tothestems of ore-crushing stamps in suchposition asto be engaged by camsupon a cam shaft, which serve to alternately raise the stamps and release them, so that they may; drop 'and crush the ore within the mortaroftthe'battery.

My invention consists in an.v improved means for securing the tappetupon the stem and in details of construction which will be more fullyexplained by referen'cdto the accompanying drawings, in Which- Figure 1is a vertical section of my inven-- tion, taken on the line x 00ofFigxZ. Fig. 2' is a horizontal section on the line y y of Fig. 1.Figs. 3 and are horizontal sections illus-' trating modifiedbores of thetappet. Fig. 5 is a horizontal sectionof the tappet similar to Fig. 2and showing the stem, the gib, and the key in dottedlines. V

In stamp-tappets as ordinarily used great strain must be put upon thegib andkeys in order to hold the tappet so firmlyto the storm that itwill not slip when the stamp is in operation, and thisstrain tendsi torupture the key-seat besides damaging thegibs and keys on account of thehard driving which is necessary to hold the parts firmly in place. Inconsequence of this thegrip' of thegibupon the stem only extends to'ashort distance beyond the bearing area of the key upon; its back, and byreason of the loose .fit of the tappet upon the stem there is butaverysmall bearing-surface between the outside ofthe, stem and the insideof the tappet-bore at the point opposite the key-seat.

It is the object of-my invention to provide an improved means forsecuring the tappets' to the stems, to increase the bearing-surfacebetween the stem and tappet, and to increase the power of the gib andkey whendriven in opposition to this surface.

In my invention, A is a stamp-stem, and B the tappet. Instead of usingone gib and two or three keys I employ independent gibs with the keys:

2, one .foreach key 3, and the key is made of such size that it' bearsupon the entire back of the gib.- The gib is a block of ample sizemade'oftough cast-ironor of cast-steel, re-

seat in the keyway. The key being about dou-- ble .the, usualsize isvery stiff and offers a corresponding resistance to deformation.Ordinarily the tappet has a uniform cylindrical bore, and'thisj fitsloosely upon the stampstem untilthe'keys are driven. The result is thatwhen the tappet is keyed on the holdingsurfaces are only that part ofthe gib which may be in contact with the stem and a narrow strip of thebore of 'the'tappet upon the opposite side of the stem ,and in ordertoprevent the -tappet from shifting the keys must bedriven veryhard withcorresponding'detriment to the parts. In my tappet the bore'is in theform of segments of cylinders of different ra- The radius of the part 4is slightly less than the radius of the stamp-stem, this part being uponthe opposite side from the keydius.

seats,where the radius of the part 5, which corresponds with the side onwhich the keyseats are, is correspondingly of larger diameter than thatof the stamp-stem. The side opposite the gib is bored out to a verytight -fiton the stem, so that the stem will fully seat in the tappetonly when driven home The stem then has a bearing at least tentimes asgreat as in the old style of bore, the tappet clamping it closely arounda considerable portion of the circumference, and it is held very tightlyin place. In consequence of this a very moderate driving of the keyswill hold the tappet very securely. The space on the gib side being somuch larger is entirely free when the keys are withdrawn, and the spacebetween the stem and the tappet is so large on this side that dust anddirt will not lodge and pack therein, as

it will easily drop out at the bottom. Consequently when the keys arewithdrawn a few blows with a heavy hammer upon the key side of thetappet will force it away from its hold upon the stem, and the largerspace into which the stem is thus forced allows the tappet to be movedeasily to any desired point for reseating.

In the modification shown in Fig. 3a recess 5' is cast in the seat &directly opposite the gibs, and this insures a perfect, althoughsomewhat reduced, bearing for the stem, which is of advantage if itshould have a loose fit.

In Fig. 4 the clearance is provided by two equal parallel boresintersecting each other and with the ridges at the junctions cut out, orthat part of the bore contiguous to the gibs may be made of largerradius than the part opposite to them butintersecting the opposite sideof the bore in which the stamp-stem fits and is normally locked by thegibs and key.

In either construction the removal of the gibs and key permits the stemto be disengaged from its seat.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. A stamp-stem tappet adapted to receive independent and separated gibsand keys upon one side, and having the bore opposite the gibs of less,and the bore upon the side adjacent to the keys of greater diameter thanthat of the stamp-stem upon which the tappet is fitted.

2. A stamp-tappet having a bore longitudinally through it approximatelyhalf of said bore being of such radius as to fit tightly about the stem,and the other and opposite portion of the bore having a larger diameterto form a clearance between itself and the stem, keyways passing throughthe tappet at two or more points removed from each other upon the sidecontiguous to the larger bore, and gibs and keys by which the smallerpart of the bore is caused to seat about the stampstem.

3. A stamp-tappet having a longitudinal bore of two diiferent radii, thesmaller of which is adapted to seat tightly around the stamp stem,openings made transversely through the tappet upon the opposite side,gibs fitting said openings, and occupying portions only of theclearance-space formed by the larger bore,and seating against thestampstem, and independent keys for each gib adapted to lock them inposition.

4. A stamp-tappet having a longitudinal bore, one portion of which is ofsmaller radius than that of the stamp-stem, and the opposite portion oflarger radius, independent gibs and chambers removed from each other andinto which they fit in the portion opposite the smaller portion of thebore, keys bearing on approximately the entire back surface of the gibs,and keyways through which they are driven to force the gibs against thestem and seat the latter in the opposing smaller bore of the tappet.

In witness whereof I have hereunto set my hand.

CHARLES C. RUEGER.

Witnesses:

J. A. RUEGER, ALFRED HAHN.

